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by indymike
1865 days ago
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> This article is a bit strange and conflates disk storage with swap and RAM. The author is pointing out that many programs duplicate OS virtual memory functionality by paging temporary data to persistent storage and loading it when needed. This duplicates the operating system's built in virtual memory capability and has negative effects on the system. The whole idea of virtual memory is to allow a system to handle loads where memory allocated exceeds the size of RAM. > Modern systems don't necessarily even have swap (looking at you, k8s) Modern linux does have swap, and it is quite useful. Proper support for swap is coming in k8s (looks like 1.23). Quite a few workloads need swap to run safely, so adding this to k8s will be an improvement. > This is also written terribly. Bad joke was bad. |
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> Modern linux does have swap, and it is quite useful. Proper support for swap is coming in k8s (looks like 1.23). Quite a few workloads need swap to run safely, so adding this to k8s will be an improvement.
Ah, I see the HN pedants have arrived. I was not claiming that Modern Linux does not have swap. Note the words "don't necessarily". I was claiming not all machines have swap.
Most of mine do not have it enabled, and I take effort to ensure on machines with 16GB or more RAM that it is disabled. I do run a K8S cluster as well, and those machines do not have swap enabled, not because K8S requires it to be off, but because having it on would be adverse to the health of the flash storage they use.
TBH, this is the kind of vapid pedantic response I've come to expect of the average of HN comments these days, and why I'm considering just not using it anymore at this point.